支持SSL端口发送邮件

go.mod

@@ -2,7 +2,10 @@ module github.com/Rvn0xsy/SMTP-NC
 
 go 1.17
 
-require github.com/gin-gonic/gin v1.7.7
+require (
+	github.com/gin-gonic/gin v1.7.7
+	github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible
+)
 
 require (
 	github.com/gin-contrib/sse v0.1.0 // indirect

go.sum

@@ -16,6 +16,8 @@ github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn
 github.com/golang/protobuf v1.3.3 h1:gyjaxf+svBWX08ZjK86iN9geUJF0H6gp2IRKX6Nf6/I=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible h1:jdpOPRN1zP63Td1hDQbZW73xKmzDvZHzVdNYxhnTMDA=
+github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible/go.mod h1:1c7szIrayyPPB/987hsnvNzLushdWf4o/79s3P08L8A=
 github.com/json-iterator/go v1.1.9 h1:9yzud/Ht36ygwatGx56VwCZtlI/2AD15T1X2sjSuGns=
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/leodido/go-urn v1.2.0 h1:hpXL4XnriNwQ/ABnpepYM/1vCLWNDfUNts8dX3xTG6Y=

main.go

@@ -1,13 +1,15 @@
 package main
 
 import (
+	"crypto/tls"
 	"embed"
 	"flag"
 	"fmt"
 	"github.com/gin-gonic/gin"
 	"html/template"
 	"io/fs"
 	"log"
+	"net"
 	"net/http"
 	"net/smtp"
 	"os"
@@ -25,17 +27,75 @@ type ProcessData struct {
 	Port string `json:"port"`
 	To []string `json:"to"`
 	Body string `json:"body"`
+	EnableSSL bool `json:"enable_ssl"`
 }
 
 func SendSMTP(Data * ProcessData){
 	auth := smtp.PlainAuth("", Data.Username, Data.Password, Data.Hostname)
 	msg := []byte(Data.Body)
-	err := smtp.SendMail(Data.Hostname +":" + Data.Port, auth, Data.SMTPFrom, Data.To, msg)
-	if err != nil {
-		log.Println(err)
-	}else {
+	servername := Data.Hostname +":" + Data.Port
+	if !Data.EnableSSL {
+		err := smtp.SendMail(servername, auth, Data.SMTPFrom, Data.To, msg)
+		if err != nil {
+			log.Println(err)
+		}else {
+			log.Println("Send Success!")
+		}
+	}else{
+		host, _, _ := net.SplitHostPort(servername)
+		// TLS config
+		tlsconfig := &tls.Config {
+			InsecureSkipVerify: true,
+			ServerName: host,
+		}
+		conn, err := tls.Dial("tcp", servername, tlsconfig)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		c, err := smtp.NewClient(conn, host)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+
+		// Auth
+		if err = c.Auth(auth); err != nil {
+			log.Println(err)
+			return
+		}
+
+		// To && From
+		if err = c.Mail(Data.SMTPFrom); err != nil {
+			log.Println(err)
+			return
+		}
+
+		if err = c.Rcpt(Data.To[0]); err != nil {
+			log.Println(err)
+			return
+		}
+
+		// Data
+		w, err := c.Data()
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		_, err = w.Write(msg)
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		err = w.Close()
+		if err != nil {
+			log.Println(err)
+			return
+		}
+		c.Quit()
 		log.Println("Send Success!")
 	}
+
 }
 
 func init() {

templates/index.html

@@ -20,13 +20,20 @@ <h1>SMTP NetCat</h1>
 <div class="container">
     <div class="row">
                 <div class="col-md-6">
+                    <p>
+                        SMTP PORT: 25 <br>
+                        SMTP SSL PORT: 465
+                    </p>
+                    <hr>
                     <div class="form-inline form-group">
                         <label for="hostname">Hostname: </label>
-                        <input type="text" class="form-control" id="hostname" placeholder="smtp.163.com">
+                        <input type="text" class="form-control" id="hostname" placeholder="smtp.163.com" width="60%">
                         <label for="port">Port: </label>
-                        <input type="number" class="form-control" id="port" placeholder="25">
+                        <input type="number" class="form-control" id="port" placeholder="25" style="width: 20%">
+                        <label for="enable_ssl"></label>
+                        <input type="checkbox" class="form-control custom-checkbox" id="enable_ssl">Enable SSL
                     </div>
-
+                    <hr>
                     <div class="form-group">
                         <label for="email">Email address: </label>
                         <input type="email" class="form-control" id="email" placeholder="">
@@ -71,6 +78,7 @@ <h1>SMTP NetCat</h1>
         ObjData.username = $("#email").val()
         ObjData.password = $("#pwd").val()
         ObjData.to = $("#to").val()
+        ObjData.enable_ssl = $("#enable_ssl").is(":checked")
         mailList = ObjData.to.split(",")
         ObjData.to = mailList
         ObjData.smtp_from = $("#smtp_from").val()